just got a new display link adapter and can't get it working.
It can't be an hardware issue as this thing is working fine with the Micro$oft OS and with Ubuntu.

My environment is as follows:
- Gentoo Linux with vanilla kernel 4.9.2, systemd
- compiled the kernel with the UDL kernel module and framebuffer support (CONFIG_DRM_UDL=y, CONFIG_FB_UDL=y)
- installed evdi-1.2.64-r1 and displaylink-driver-1.2.58 from the hossie-Overlay
- updated the ebuild to driver version 1.2.65 (the current one) and installed it
- Desktop environment: GDM / Mate desktop

Sometimes the device reconnects itself and appears a second time for no reason. Therefore:
$ xrandr --setprovideroutputsource 2 0

Result:
The screen appears in the screen configuration tool, but trying to set it on fails with an error notification: "The selected configuration for displays could not be applied".
It also doesn't work when I try to set a lower resolution / refresh rate.